The supply of clean water,wonder drugs such as penicillin,and vaccines for a wide variety of diseases have saved millions of lives world-wide.是什么意思_The supply of clean water,wonder drugs such as penicillin,and vaccines for a wide variety of diseases have saved millions of lives world-wide.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句